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DURCHSCHNITTLICHE ANZAHL DER LIKES
Feeds
Frage
figure export in epsc-file produce artefacts
Hello Community, the LineStyle of the figure and the exported "eps-File" are different. Is this a bug in the eps-export routin...
9 Monate vor | 1 Antwort | 0
1
AntwortFrage
model reduction from a database created with xfoil
Hello community, i have created a database with xfoil (2d airfoil panel code with an boundary solver). The database is saved i...
etwa ein Jahr vor | 1 Antwort | 0
1
AntwortFrage
add / interpolate arrays of different length
Hello community, i have two array's tsol and ysol. Each array has the length of 9; I have also an error estimate array errorEs...
mehr als ein Jahr vor | 1 Antwort | 0
1
AntwortFrage
exact 2D Chebyshev Interpolation
Hello community, with pseudospectral methods it is possible to obtain a high resoltution solution with a small mesh. I added a...
etwa 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to solve a simplified 2D trajectory problem with defined points and derivatives
Hello, how could i solve this. Two Points are given, also the velocity and the direction What is the simplest trajectory whic...
etwa 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how can a symbolic derivative be vectorized automatically?
Hello, here is the simplified problem. I have a symblic function with three arguments. And the derivative of f wrt. b syms a...
etwa 2 Jahre vor | 3 Antworten | 0
3
Antworten
Gesendet
Composite Simpson's rule for irregularly spaced data
Composite Simpson's rule for irregularly spaced data based on a parabolic polynomial fit.
mehr als 2 Jahre vor | 1 Download |
Frage
find the minimum objective for a given ode as boundary value problem
Hello Community, could you give me hint how to tackle this problem. I have an ode (c has a positive value): dxdt2 = a+b*t - c...
fast 4 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
eigs with Extended Capabilities
Hello Community, in the documentation of eigs: Extended Capabilities Thread-Based Environment Run code in the background usi...
etwa 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
solve efficiently sparse large linear system of equations
Hello Community, i have a large sparse block structured matrix. with this quadratic sparse Matrix L: is there any faster wa...
mehr als 4 Jahre vor | 2 Antworten | 0
2
Antwortenset efficently specific rows in a sparse matrix to 0
here are the benchmark results: ver Var2 ___ _____ 1 2.242 2 NaN 3 0.87 for v...
mehr als 4 Jahre vor | 0
Frage
set efficently specific rows in a sparse matrix to 0
Hello comunity, I have a sparse matrix J and i want to set specific rows to 0. My code's like this: J = sparse(blkdiag(rand(1...
mehr als 4 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
function interpolation and root finding
Hello community, i have 37 points in in the interval [-.5 .5]. and i'm looking for a minimum. I have written a script which use...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
testing SVD Performance on M1
Hello Community, here is a script for testing the M1 performance on solving a SVD Problem. (Parallel Computing Toolbox is requi...
mehr als 4 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
vectorize a for loop
Hello Community, i need ur help, to speed up a routine. i have n points in space and i need the distances between all points. ...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Solve large linear equations with backslash operator. Why is sparse matrix solved slower than the full matrix?
Hello Community and Staff, maybe somebody could explain to me why sparse matrix operation for a not so well condidioned matrix ...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
2d Chebyshev polynomial interpolation
Hello Community, may i ask you for your help. I have a full matrix M with the N+1 number of elments in each direction. The x...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortGelöst
Calculate Amount of Cake Frosting
Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...
fast 5 Jahre vor
Gelöst
Calculate BMI
Given a matrix |hw| (height and weight) with two columns, calculate BMI using these formulas: * 1 kilogram = 2.2 pounds * 1 ...
fast 5 Jahre vor
Gelöst
Calculate Inner Product
Given two input matrices, |x| and |y|, check if their inner dimensions match. * If they match, create an output variable |z|...
fast 5 Jahre vor
Gelöst
Solve a System of Linear Equations
*Example*: If a system of linear equations in _x₁_ and _x₂_ is: 2 _x₁_ + _x₂_ = 2 _x₁...
fast 5 Jahre vor
Gelöst
Find the Oldest Person in a Room
Given two input vectors: * |name| - user last names * |age| - corresponding age of the person Return the name of the ol...
fast 5 Jahre vor
Gelöst
Convert from Fahrenheit to Celsius
Given an input vector |F| containing temperature values in Fahrenheit, return an output vector |C| that contains the values in C...
fast 5 Jahre vor
Frage
how to create a symbolic derivative of f(r(x,y),theta(x,y)) and evaluate it
Hello Community, i have some more or less complicated funtions, e.g. a simple one: f(r,theta) = r*(pi*cos(theta)+2*sin(theta))...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
solve large sparse jacobian matrix (with an example)
Hello Community, do you have a good suggestion if an iterative solver would be faster. This jacobian J with ( N = 32 ) took me...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
get ridoff "for loops" while defining matrices elements, incl. improvement and reference
Hello Community, is it possible to write a code which is faster than my version? function D = Dp(N) D = (zeros(N-1,N-1)); fo...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
simple Matrix manipulation without for-loop needed
Hello Community, i need your help. I have a matrix which size is (N+1,N+1). I have also some vectors with different length. Th...
fast 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
extract elements and build the remain vector
Hello Community, i need your help. A vector v has 128 elements with random numbers. The elements of index 1 21 31 41 should ...
etwa 5 Jahre vor | 2 Antworten | 1
2
AntwortenGelöst
Make a full wave rectifier
Produce a full wave rectifier waveform for the given sine wave source. For a sine wave input, the output of the full wave rec...
etwa 9 Jahre vor
